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全球海水淡化产水的60%用于市政供水,在海水淡化产能中采用反渗透膜技术的占65%。监测了我国万吨级膜法海水淡化厂的出厂水水质,并与国标以及城市自来水水质进行了对比。结果表明,除硼外淡化水其他指标均符合《生活饮用水卫生标准》(GB 5749—2006),但硼含量低于世界卫生组织WHO的《饮用水水质导则》限值(2.4 mg/L)以及欧美、日本的限值(1.0 mg/L)。淡化出厂水的常规指标与四个大城市(深圳、南昌、上海和天津)的自来水水质相当或更优。此外,监测计算了淡化出厂水的碳酸钙沉淀势,其值位于4.8~6.5 mg/L之间,水体倾向于保护性结垢,不会腐蚀管路或溶解管路中已有的保护性垢层。基于对淡化厂产品水水质的实验测定及数据分析,提出了淡化水水质与饮用安全的相关发展建议。
Sixty percent of the global desalination water is used for municipal water supply, and 65 percent of the total use of reverse osmosis membrane technology in desalination capacity. The water quality of factory-made water of 10,000-ton membrane desalination plant in our country was monitored and compared with that of national standard and city tap water. The results showed that the other indexes of desalinated water except boron were in line with the standard of sanitary drinking water (GB 5749-2006), but the content of boron was lower than the WHO guideline of drinking water quality (2.4 mg / L ) And the limits of Europe, America and Japan (1.0 mg / L). The conventional indicators of desalinated water are of equal or better quality than tap water in four major cities (Shenzhen, Nanchang, Shanghai and Tianjin). In addition, the calcium carbonate precipitation potential of desalination water was monitored and calculated at a value between 4.8 and 6.5 mg / L. The water body tended to be protectively fouling without corrupting the existing protective scale in the pipeline or in the dissolution pipeline Floor. Based on the experimental measurement and data analysis of the desalination plant’s product water quality, some related suggestions on the desalination water quality and drinking safety are put forward.